Archive for the Category ◊ Jigs and Fixtures ◊

Author:
• Thursday, November 21st, 2019
Veritas shooting plane

Shooting is a gateway skill to precise hand tool woodworking. So get started by shooting with the planes you have. 

The basic requirements are:

  • Mass. You want substantial momentum to firmly and steadily carry the blade through the cut after you get it started, especially for end grain shooting. 
  • The side of the plane should be square to the sole. If you only have a not-so-great plane, use tape to shim the side. I did this with my old Record jack plane when it was the only one I had. [Please see in the Comments section reader Michael’s germane point and my lengthy reply for more details on the squareness issue.]
  • It helps a lot to have a comfortable, secure grip to consistently apply pressure where it is needed. Dedicated shooting planes have this feature. 
  • The blade must be sharp. Sharp! A dull blade is not only harder to push through the cut, but accuracy will suffer as the plane and the blade itself deviate from a true path. 

For end grain shooting:

Best: a dedicated shooting plane. 

Veritas shooting plane

I use the Veritas shooting plane, and love it. Comfortable and accurate to use, it meets all the requirements above. The adjustable-angle handle properly and comfortably directs pressure, and the 20° skew really eases the blade through the cut. The bevel-up design is easy to set up and adjust, and provides excellent support to the blade close to its edge.

Is it worth spending about $350 dollars on a plane just for shooting? In view of all the other expenses involved in woodworking, yes, it is. (See the first sentence of this post.)

Lie-Nielsen also makes a great shooting plane, which I have had a chance to use briefly. This massive tool uses a bevel-down design and a skewed, Bedrock-style adjustable frog. Personally, I like the Veritas design and features, but both merit consideration. 

I use a straight edge blade for end grain shooting – no camber

Good: a bevel-up bench plane. 

Veritas jack plane

The Veritas BU jack plane is perhaps the most versatile plane of all, and a good shooter. The BU design gives good blade support, and makes it easy to swap dedicated blades for its varied uses. You can get a decent grip on this plane for shooting.

Adequate: a bevel-down bench plane. 

I used a BD jack and jointer for shooting for years. I do not consider these ideal but they can get the job done. Don’t let anyone tell you that you “can’t” cut end grain with a bevel-down plane. Use a sharp blade, and set the chipbreaker close to the edge to reduce deflection.

bevel-down jointer and jack planes

Gripping a bevel-down bench plane for shooting may be a bit awkward for some. With the jack, I squish the base of my thumb behind the side hump and plant four fingers on the lever cap. A grippy glove can help. (So then you’ll have one on both hands.) 

For long grain shooting:

Compared to using a plane with the blade on the bottom (the “regular” way) this is just a matter of different manual mechanics. The plane is not running in a track as in end grain shooting. 

So, a BU or BD bench plane is fine, as long as it has decent mass and stability, the side is square to the sole, and you can get a decent grip. And . . . the blade is sharp.

I like my Lie-Nielsen #9 “iron miter plane,” which I’ve dedicated to long grain shooting, because its beefy, boxy design makes it stable through the stroke, and it handles exceptionally well with the “hot dog” grip. This is a bevel-up design with a 20° bed. (Hmm . . . ) Unfortunately, I don’t see it on their website any more. Veritas sells a somewhat similar plane. 

Lie-Nielsen #9

I keep the #9 set up with a straight edge blade, mostly because it is easier to maintain and works well for the thin stock that I’m usually using when long grain shooting. A mild camber, such as for a jointer plane, is also a good option, especially if you will be long grain shooting thicker stock, or if you are also using the same plane and blade for general tasks.

Author:
• Thursday, October 31st, 2019
long grain shooting

Long grain shooting does not get the attention this valuable technique deserves. A cousin to end grain shooting, it is just as simple in principle but more so in practice. 

We are simply planing straight and square along the long grain edge of a board by laying it flat, elevating it, and using the plane on its side, which must be accurately square to the sole.

In general, this is most useful for workpieces about two feet long or less. This stock is often fairly thin, and may also be narrow. A good example is preparing quartersawn pieces to glue up for small to medium drawer bottoms.

It is difficult to balance a plane on the edge of a workpiece thinner than about 1/2″ held in the front vise. Shooting is a much more stable setup, and still allows a good sense of the nuances along the edge – straight or cambered. (An alternative is to plane two or more boards at once in the front vise.)

All you really have to do is lay the board flat on a support board with the long edge of the workpiece slightly overhanging the edge of the support piece. The sole of the plane is therefore riding only on the work piece, unlike with end grain shooting. In fact, a minimalist setup could be to just place a support board underneath the workpiece, and clamp the pair to the workbench, upon which the side of the plane will ride.

I use a dedicated long grain shooting board (below) that accommodates work up to about 24″ long. (Long time readers may recognize that it has been modified from its former role in end grain shooting.)

shooting board for long grain

This arrangement allows me to reach over the workpiece and plane the edge that is facing away from me, which creates similar body mechanics to the usual way of pushing a plane. The PSA-backed UHMW slick plastic installed on the plane track makes the work easier.

long grain shooting

The workpiece (the curly maple in the above photo) must be controlled in all directions. For lateral control along the length, I use an ad hoc arrangement with a scrap board clamped to the near side of the shooting board. Alternatively, you could make a more elaborate jig with a wider, permanent, adjustable, screw-mounted lateral-control board on the side away from you, and plane the edge facing you. This seems awkward to me.

The end of the workpiece meets the front stop. Ideally, this is a square meeting but that is not essential. Mild downward pressure on the workpiece is supplied by you. You may be able to get away without using the clamp and lateral stop board for small pieces. I find the grippy glove (top photo) makes the work easier for all setups, small or large, clamped or not.

There is no reason to over-complicate this technique. Keep it simple and use it often. 

Next: planes for end grain and long grain shooting.

Category: Jigs and Fixtures, Techniques  | Tags:  | 2 Comments
Author:
• Saturday, October 19th, 2019
Tormek with felt wheel

For a long time, I have not liked the leather honing wheel on the Tormek. I never used it for general sharpening because I prefer stones, but even for knives, gouges, and an occasional touch up of other edges, I find it fragments easily and does not hold the honing compound as well as I would like.

I finally got around to setting up the wheel with felt. It was easy to remove the leather and scrape clean the plastic base of the wheel. 

I got the felt from McMaster. I first tried PSA-backed felt just for the convenience of applying it to the wheel. The hardest available in this style was “Firm” F1. A 3/16″-thick strip proved to be still too soft.

The harderHard” felt is available only in sheets without the PSA backing. I cut the 1/8″-thick, 12″ x 12″ sheets into strips and applied them with 3M General Purpose 45 spray adhesive using simple butt joints to make a continuous layer around the wheel. The S2-20 (durometer 50A) works best. The S2-32 (durometer 80A) is nominally about half as compressible as the S2-20 but the difference does not seem to matter for this purpose. I prefer the texture of the S2-20 as it seems to grab the honing compound better.

Because I use the wheel for fine finishing, I charged it with 0.5 micron diamond. Mineral oil-based paste and water-based spray will both work but I think the paste is better. They cut fast but can get expensive over time. An economical alternative is a stick of Formax “green micro fine honing compound,” which I surmise is also about 0.5 micron, available from Woodcraft. Of course, it cannot cut as fast as diamond but with patience it can still produce an excellent edge. 

My preference is mineral oil-based synthetic diamond paste from Beta Diamond Products. It cuts fast and consistently, and a little bit goes a long way. I find the jar easier to deal with than the syringe. 

Bottom line: the felt replacement works very nicely; I like it a lot better than the leather wheel. It is especially helpful for knives, gouges, and is even handy for quick touch ups of plane blades and chisels. I keep these touch ups very light because I don’t want to round the edge too much, which would interfere the next time I work the edge on stones.

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Author:
• Wednesday, January 31st, 2018

tenon shoulder jig

This simple jig makes it easy to produce highly accurate tenon shoulders on the table saw. Admittedly, it is a nicety, not a necessity, but I have been delighted with the consistently excellent results from it.

The special feature is that both edges of the fence are used, in turn, to register the work piece. This allows you to work from a single reference edge of the rail. This is hand-tool style – you do not assume the two edges of the rail are exactly parallel. Yes, they probably are, close enough at least, but I like potential errors to cancel whenever I can. Setting up a jig like this means I only have to be dead on once – when I make the jig.

This means that the edges of the fence must be absolutely parallel to each other. They are, within a thou.

Also, a sled is a generally more accurate way to crosscut on the table saw because the work piece does move against any surface. Of course, the miter slot must be accurately parallel to the blade for this jig, or for any device that slides in the miter slot, to work well.

Making the jig

The overall dimensions of the jig are 21″ x 14″.

build a tenon shoulder jig

Trim the UHMW strip to a snug fit in the miter slot, and then attach it to the 3/4″ MDF base of the sled using screws entering through the top. Locate the runner so that there is a little bit of the base extending to the right beyond the blade. Then, trim the right edge of the sled by sliding the base in the miter slot. The other three edges of the base are not critical; cut them only for a neat appearance.

The fence is 3/4″ MDF, 2 1/2″ wide. Stable, quartersawn hardwood is probably a better choice of material because it is easier to trim straight and square, but I got lucky when ripping this piece of MDF so I used it. Using 1/4″-20 flat-head bolts through the bottom of the base, attach the fence square to the right edge of the base. T nuts make it easier to tune the angle now, or later if needed.

Neatly add PSA 220-grit sand paper to both working edges of the fence. The big knob in the middle helps in maneuvering the sled.

In use

A stop block is easily added to my VSC table saw fence. Mark the reference of edge of the rail. Adjust the blade height. Remember to readjust the blade height if you are making a tenon that is not centered on width of the rail.

Cut one shoulder . . .

cutting tenon shoulders

and then the other, using the same reference edge of the rail.

tenon shoulders on the table saw

You also can make the little “connecting” (edge) shoulders with this jig on the table saw. However, errors can creep in. When the rail is held on its long edge, it can register differently against the stop block than when it is held on its face. This will result in the end shoulder(s) not aligning with the face (main) shoulders. So, I often prefer to do these by hand, which is easy.

As always, there’s more than one good way to get the job done.

Author:
• Sunday, January 28th, 2018

tenon shoulder trimming jig

Tenon shoulders must meet stringent standards to produce a good joint – straight, at the correct angle to the length of the rail (usually 90°), accurately paired on both sides of the joint to meet the surface around the mortise, and in position to make the length of the rail fit the overall structure. Thus, whether produced by machine or by hand, you need a reliable method to tweak tenon shoulders. A shoulder plane has no equal for this task, but it needs a good work setup to make it function well.

This jig meets that need. In 2016, I wrote in detail about the jig that I had been using for many years. I usually use my Clifton 410 small shoulder plane or, for large work, the big Lie-Nielsen. For small work and other delicate adjustments, I like my little Japanese shoulder plane, used on the pull stroke.

To use both styles of planes, the jig should be reversible. Why didn’t I do this a long time ago? I removed the front cleat, and repositioned the bottom cleat, which fits in the tail vise, to the middle of the base.

tenon shoulder jig

Now I can use the jig for push-style shoulder planes:

tenon shoulder trimming

And, by rotating the jig 180° and using the other end of the fence, for pull-style shoulder planes:

Japanese shoulder plane

In either direction, the plane moves toward a hardwood backup piece that prevents spelching at the exit end of the work piece. This replaceable element is secured with deeply countersunk screws. The graphics on the top remind me of the presence and depth of the screw heads.

tenon shoulder trimming jig

After this revision, the jig is reduced in overall size to about 8 1/2″ x 12 1/2″, but that does not matter. It can accommodate even large work pieces by using a scrap of wood under the rail for outboard support. The toggle clamp, along with the self-clamping effect of always working toward the fence, keeps the work piece secure.

The jig is quick and easy to build, and I think you will find it helpful for this exacting task.

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Author:
• Saturday, December 30th, 2017

curved cork sanding block

Customized shaped blocks are a must for properly sanding concave curves. They are a key player on the Tools for Curves team. Cork has the ideal flexibility and resiliency for backing the sandpaper.

Lately, I have been making the blocks entirely from cork. These work better and are easier to make than what I formerly used, which was shaped wooden blocks with a layer of cork added to the working surface. By the way, I have experimented with pink foam board insulation and found it difficult to shape reliably.

To make these all-cork blocks, you need thick stock. It is wonderfully easily to cut with a handsaw or bandsaw, and shape with a moderate-grain rasp. The curve does not always need to be a constant radius – simply draw it freehand and saw. Refine it with the rasp, ensuring that it is just a bit steeper than the steepest section of the work piece.

cork block

Make the thickness of the block to your liking based on how you want to grip the block. The block pictured at the top is about 1 1/2″ thick. You can try to size the block for optimal convenience in cutting the sandpaper from standard 9″x11″ sheets, and to minimize waste, but good function and feel in the hand are the more important factors for me.

Saw kerfs 3/4 -1″ long about 1/2″ from the top face of the block to house the ends of the sandpaper. Hand pressure will naturally keep the paper in place (see below) even in fine grits and more so in coarse grits. No wedges or clips are needed. The chamfers at the beginning of the slots toward the working face are important.

curved cork sanding block

To install the sandpaper:

Enter one end just a little into the slot, then bring the other end around the block and push it almost all the way into its slot. Working back the other way, snug the paper around the block and then push the original end as far as possible into its slot. Make a final tightening of the paper by pressing the paper it against one of the chamfers then use your fingertips to goose the paper even more into the slot.

cork sanding block

The simple design of these blocks along with this paper insertion procedure produce a tighter hold on the sandpaper against the surface of the block than any commercial curved block that I have used (none of which I like).

Finally, the light weight of an all-cork block is an asset not to be underestimated in the countless (ugh!) reciprocation of sanding work.

Find thick cork by searching online. Try “cork blocks” or “cork yoga blocks.” I suggest the Corkstore (Jelenik Cork Group), which currently sells a 9×5″x5″x3.5″ yoga block for $19.25, and 12″x8″x2″ block for $17.10. This is a nice fine grain cork that is easy to shape reliably. Dick’s Sporting Goods sells a 9″x4″x6″ block, so you might be able to find it locally.

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Author:
• Friday, August 25th, 2017

mortise jig wedge clamps

In two earlier posts, I presented a router mortise jig. As writing is a good occasion to rethink matters, I have upgraded the clamping system on the jig. What’s more, this general design for a wedge clamp system can be applied to other shop jigs and fixtures to increase their holding range.

The mechanical advantage produced by the humble wedge is a wonderful earthly thing. I used larger blocks that rotate on an off-center pivot to accommodate a much greater range of workpiece width. The plywood base of the jig is also wider than the original to allow for this, and thicker at 3/4″ for greater strength. The blocks and wedges are 5/8″ thick.

Each block is 2 1/2″ square. The center of the pivot hole is 1/2″ from one edge, and 1″, 1 1/2″, and 2″ from the three other edges. Thus, there are four different rotational positions to create a large range of clamping width capacity.

Below, the block is in position to clamp the widest workpieces.

wedge clamps

The wedge is 8 ¼” long with a 1:7 slope. This produces slightly more than 1/2″ range of clamping width, which spans the difference from one block position to the next.

Below, the block is in position for the second-to-narrowest clamping capacity.

wedge clamps

A 1/4-20 x 1 1/2″ hex bolt, unthreaded in the 5/8″ nearest its head, enters from the bottom of the base with the head recessed in a counterbore. It is secured above the block with a nylon-insert lock nut, which is tightened to allow free but firm rotation of the block.

The wedge clamps work so well that they may obviate the need for the toggle clamps. The wedge system particularly makes the jig better for mortising frame members. Because these are narrower than leg blanks, they are best clamped in a pair to increase the seating width for the base of the router jig.

Author:
• Thursday, June 29th, 2017

router mortise jig

Now let’s work through the elements of the jig. The top photo again shows an overall view with a leg blank in place.

Basic construction:

The jig is built on a piece of plywood about 5″ wide and 39″ long. Screwed down along one edge is a double-width T track with the groove placed up at the outer edge. The wide T-track allows the sliding stops to be far enough away from the leg blank to make room for the router fence. (See previous post.)

Workpiece registration:

The side of the leg blank registers against the track, and the end registers against the moveable tab stop that you can see sticking out sideways from the track in the photo below. (It is dark wood – wenge – with a brass knob.)

router mortise jig

Clamping the workpiece:

Two toggle clamps are mounted on 1 7/8″ square x 5″ moveable blocks, which are secured in the track with T bolts. These clamps provide lots of holding power and can be positioned away from the routing action.

For use in addition to, or instead of, the toggle clamps, there is a wedge system, seen in the photo below. This consists of three 5/8″ square x 1″ blocks, distributed along the length of the plywood, that are bolted to the plywood but free to rotate. Wedges, 5/8″-thick x 8″-long with a 1:7 slope, secure the workpiece.

router mortise jig

Stops for limiting the length of the mortise/haunch:

These are 3/4″ x 2 1/2″ x 2 1/2″ blocks that position in the T track and lock down with T bolts and star knobs. You can see them at the sides of the photo below.

router mortise jig

At the right of the photo below, the router fence jig meets the stop to define the bottom of the mortise.

router mortise jig

At the left of the photo below, the router plate jig meets the stop to define the bottom of the haunch (the limit of the full-depth mortise).

router mortise jig

In the photo below, the left-side stop has been moved out of the way create the haunch all the way to the end of the leg. In practice, you would rout this first. Then you would move the left-side stop into place to define the top of the full-depth mortise, as seen just above. That location is “remembered” by the little maple stop with the brass knob.

router mortise jig

In summary:

  • Understood in its separate elements, the jig is not difficult to make.
  • In practice, the whole thing is very intuitive to set up from mortises marked out in the traditional manner on one leg only.
  • The mortising work moves along quickly.
  • The jig can handle most common leg blank sizes that you will use to prepare the joinery before cutting the shape of the leg.
  • It can also be used with rail and stile work but workpieces thinner than about 1 1/4″ will need to be paired with thicker wood to better support the router. The jig was designed mainly for mortising table legs.

[Skip this paragraph if you want; it will be apparent when you work with the jig. Depending on the circumstances and personal preferences, you can rout four corresponding mortises with the leg registered at one end of the jig, retain the router fence setting, and then reset the mortise jig to register the legs at the opposite end of the jig to make the other four mortises. Alternatively, you can retain the mortise jig settings and reset the router fence.]